diff --git a/food_api/food_api.py b/food_api/food_api.py
index b3eaa6a..3f76137 100644
--- a/food_api/food_api.py
+++ b/food_api/food_api.py
@@ -12,9 +12,10 @@ app.add_middleware(
 )
 
 @app.get("/")
-def read_root():
+def read_root(mock: bool = False):
     return {
-        'sladovnicka': getMenuSladovnicka(),
-        'uMotliku:': getMenuUMotliku(),
-        'techTower': getMenuTechTower()
+        'sladovnicka': getMenuSladovnicka(mock),
+        # TODO opravit dvojtečku!
+        'uMotliku:': getMenuUMotliku(mock),
+        'techTower': getMenuTechTower(mock)
     }
diff --git a/food_api/food_service.py b/food_api/food_service.py
index 0346a55..27d5446 100755
--- a/food_api/food_service.py
+++ b/food_api/food_service.py
@@ -96,7 +96,14 @@ def printMenu(name: str, foodList: List[Food]):
     print('\n')
 
 
-def getMenuSladovnicka() -> List[Food]:
+def getMenuSladovnicka(mock: bool = False) -> List[Food]:
+    if mock:
+        foodList: List[Food] = []
+        foodList.append(Food("Zelná polévka s klobásou", "0,25l", "35 Kč", True))
+        foodList.append(Food("Hovězí na česneku s bramborovým knedlíkem", "150g", "135 Kč"))
+        foodList.append(Food("Přírodní holandský řízek s bramborovou kaší, rajčatový salát", "250g", "135 Kč"))
+        foodList.append(Food("Bagel s vinnou klobásou, cibulový konfit, kysané zelí, slanina a hořčicová mayo, hranolky, curry omáčka", "350g", "135 Kč"))
+        return foodList
     html = getOrDownloadHtml('sladovnicka', URL_SLADOVNICKA)
     soup = BeautifulSoup(html, "html.parser")
     div = soup.select_one("div.tab-pane.fade.in.active")
@@ -137,7 +144,14 @@ def getMenuSladovnicka() -> List[Food]:
     return foodList
 
 
-def getMenuUMotliku() -> List[Food]:
+def getMenuUMotliku(mock: bool = False) -> List[Food]:
+    if mock:
+        foodList: List[Food] = []
+        foodList.append(Food("Hovězí vývar s nudlemi", "0,33l", "35 Kč", True))
+        foodList.append(Food("Opečený párek, čočka, sázené vejce, okurka", "150g", "135 Kč"))
+        foodList.append(Food("Hovězí líčka na červeném víně, bramborová kaše", "150g", "145 Kč"))
+        foodList.append(Food("Tortilla s trhaným kuřecím masem, uzeným sýrem, dipem a kukuřicí, míchaný salát", "150g", "135 Kč"))
+        return foodList
     html = getOrDownloadHtml('u_motliku', URL_MOTLICI)
     soup = BeautifulSoup(html, "html.parser")
     table = soup.find("table", {"class": "Xtable-striped"})
@@ -175,7 +189,13 @@ def getMenuUMotliku() -> List[Food]:
     return foodList
 
 
-def getMenuTechTower() -> List[Food]:
+def getMenuTechTower(mock: bool = False) -> List[Food]:
+    if mock:
+        foodList: List[Food] = []
+        foodList.append(Food("Bavorská gulášová polévka s kroupami", "-", "40 Kč", True))
+        foodList.append(Food("Vepřové výpečky, kedlubnové zelí, bramborový knedlík", "-", "120 Kč"))
+        foodList.append(Food("Hambuger Black Angus s čedarem a slaninou, cibulové kroužky", "-", "220 Kč"))
+        return foodList
     html = getOrDownloadHtml('techtower', URL_TECHTOWER)
     soup = BeautifulSoup(html, "html.parser")
     fonts = soup.find_all("font", {"class": ["wsw-41"]})
@@ -189,7 +209,7 @@ def getMenuTechTower() -> List[Food]:
     siblings = font.parent.parent.find_next_siblings("p")
     # dayNumber = date.today().strftime("%w")
     currentDayName = getDayNameOfDate(datetime.datetime.now())
-    foodList = []
+    foodList: List[Food] = []
     doParse = False
     for i in range(0, len(siblings)):
         text = siblings[i].text.strip().replace('\t', '').replace('\n', ' ')
diff --git a/run_dev.sh b/run_dev.sh
index 4f26119..49583c3 100755
--- a/run_dev.sh
+++ b/run_dev.sh
@@ -1,3 +1,4 @@
+export NODE_ENV=development
 ./food_api/run_dev.sh &
 cd server && yarn install && yarn start &
 cd client && yarn install && yarn start &
diff --git a/server/.env.development b/server/.env.development
new file mode 100644
index 0000000..2c143ae
--- /dev/null
+++ b/server/.env.development
@@ -0,0 +1 @@
+MOCK_DATA=true
\ No newline at end of file
diff --git a/server/package.json b/server/package.json
index 4659169..d5a02ce 100644
--- a/server/package.json
+++ b/server/package.json
@@ -18,6 +18,7 @@
   "dependencies": {
     "cheerio": "^1.0.0-rc.12",
     "cors": "^2.8.5",
+    "dotenv": "^16.1.3",
     "express": "^4.18.2",
     "request": "^2.88.2",
     "request-promise": "^4.2.6",
diff --git a/server/src/chefie.ts b/server/src/chefie.ts
index 3ed38fd..ebd8fc6 100644
--- a/server/src/chefie.ts
+++ b/server/src/chefie.ts
@@ -110,7 +110,7 @@ export const fetchPizzy = async () => {
 // TODO tohle sem absolutně nepatří! dát do vlastní servisky!
 export const fetchFood = async () => {
     try {
-        const json = await rp(foodUrl);
+        const json = await rp({ uri: foodUrl, qs: { "mock": process.env.MOCK_DATA } });
         return JSON.parse(json);
     } catch (error) {
         console.error("Chyba při volání Food API", error);
diff --git a/server/src/index.ts b/server/src/index.ts
index 8b3ea50..2ef1cd2 100644
--- a/server/src/index.ts
+++ b/server/src/index.ts
@@ -4,6 +4,11 @@ import bodyParser from "body-parser";
 import { fetchFood, fetchPizzy } from "./chefie";
 import cors from 'cors';
 import { getData, updateChoice } from "./service";
+import dotenv from 'dotenv';
+import path from 'path';
+
+const ENVIRONMENT = process.env.NODE_ENV || 'production'
+dotenv.config({ path: path.resolve(__dirname, `../.env.${ENVIRONMENT}`) });
 
 const app = express();
 const server = require("http").createServer(app);
diff --git a/server/src/service.ts b/server/src/service.ts
index b458ee1..6a22881 100644
--- a/server/src/service.ts
+++ b/server/src/service.ts
@@ -1,7 +1,7 @@
 import { ClientData, Locations } from "./types";
 import { db } from "./database";
 import { getHumanDate, getIsWeekend } from "./utils";
-import { getDate } from "./utils";
+import { formatDate } from "./utils";
 
 // /** Jedna konkrétní pizza */
 // interface Pizza {
@@ -31,17 +31,24 @@ import { getDate } from "./utils";
 //     orders?: Order[], // seznam objednávek, pokud není vyplněno, není založen pizza day
 // }
 
+/** Vrátí dnešní datum, případně fiktivní datum pro účely vývoje a testování. */
+function getToday(): Date {
+    if (process.env.MOCK_DATA) {
+        return new Date('2023-05-31');
+    }
+    return new Date();
+}
+
 /** Vrátí "prázdná" (implicitní) data, pokud ještě nikdo nehlasoval. */
 function getEmptyData(): ClientData {
-    return { date: getHumanDate(new Date()), isWeekend: getIsWeekend(new Date()), choices: {} };
+    return { date: getHumanDate(getToday()), isWeekend: getIsWeekend(getToday()), choices: {} };
 }
 
 /**
  * Vrátí veškerá klientská data pro aktuální den.
  */
 export function getData(): ClientData {
-    const data = db.get(getDate()) || getEmptyData();
-    console.log("Vracím data pro dnešní den", data); // TODO smazat
+    const data = db.get(formatDate(getToday())) || getEmptyData();
     return data;
 }
 
@@ -70,7 +77,7 @@ export function getData(): ClientData {
 // }
 
 export function initIfNeeded() {
-    const today = getDate();
+    const today = formatDate(getToday());
     if (!db.has(today)) {
         db.set(today, getEmptyData());
     }
@@ -91,7 +98,7 @@ export function removeChoice(login: string, data: ClientData) {
 
 export function updateChoice(login: string, choice: Locations | null) {
     initIfNeeded();
-    const today = getDate();
+    const today = formatDate(getToday());
     let data: ClientData = db.get(today);
     data = removeChoice(login, data);
     if (choice !== null) {
diff --git a/server/src/utils.ts b/server/src/utils.ts
index 0868dc2..7810019 100644
--- a/server/src/utils.ts
+++ b/server/src/utils.ts
@@ -1,5 +1,5 @@
-export function getDate() {
-    const date = new Date();
+/** Vrátí datum v ISO formátu. */
+export function formatDate(date: Date) {
     let currentDay = String(date.getDate()).padStart(2, '0');
     let currentMonth = String(date.getMonth() + 1).padStart(2, "0");
     let currentYear = date.getFullYear();
diff --git a/server/yarn.lock b/server/yarn.lock
index 0acfc35..7ea54e0 100644
--- a/server/yarn.lock
+++ b/server/yarn.lock
@@ -465,6 +465,11 @@ domutils@^3.0.1:
     domelementtype "^2.3.0"
     domhandler "^5.0.1"
 
+dotenv@^16.1.3:
+  version "16.1.3"
+  resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-16.1.3.tgz#0c67e90d0ddb48d08c570888f709b41844928210"
+  integrity sha512-FYssxsmCTtKL72fGBSvb1K9dRz0/VZeWqFme/vSb7r7323x4CRaHu4LvQ5JG3+s6yt2YPbBrkpiEODktfyjI9A==
+
 ecc-jsbn@~0.1.1:
   version "0.1.2"
   resolved "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.2.tgz"