Added running on docker support

Dockerfile

@@ -0,0 +1,7 @@
+FROM python
+WORKDIR /app
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+COPY . .
+EXPOSE 8000 8001 8002
+CMD ["python", "server.py"]

README.md

@@ -202,3 +202,36 @@ An example of how a question and its details is stored in the database:
 ```
 
 As shown in the above example, one question can be answered by many users and each user is represented by his ID
+
+# Running on Docker
+
+- In order to run the project on docker for the **first time**, ***or*** you have updated the server, run the following commands in terminal:
+
+```shell
+cd path/to/your/project
+docker-compose build
+docker-compose up
+```
+
+- If you have already run the above commands before, and you just want to run the server on docker run the following command:
+
+```shell
+docker-compose up
+```
+
+- To stop the server run the following command:
+
+```shell
+docker-compose down
+```
+
+- Since the default environment is the `dev` the docker will run using `.env.dev` file on port `8002`.
+- The docker file also exposed to ports `8000` and `8001`. So in order to run in `prod` environment you must change `globals.env_status` to `prod` which will run the docker on port `8001`.
+
+- To push the docker image to the docker hub you have to build it first and then run the following commands in the terminal:
+
+```shell
+docker tag <your-image-name> <your-docker-username>/<the-image-name-you-want-to-have-at-dockerhub>:<your-image-tag>
+docker login
+docker push <your-docker-username>/<the-image-name-you-want-to-have-at-dockerhub>:<your-image-tag>
+```

docker-compose.yml

@@ -0,0 +1,8 @@
+version: "3.8"
+services:
+  server:
+    build: .
+    ports:
+      - "8000:8000"
+      - "8001:8001"
+      - "8002:8002"

server.py

@@ -29,7 +29,7 @@ def add_routes():
         # start server
         add_routes()
         port = 8002 if globals.env_status == "dev" else 8001
-        uvicorn.run(app, host="127.0.0.1", port=port)
+        uvicorn.run(app, host="0.0.0.0", port=port)
 
     except Exception as e:
         print(e)