Dockerise question service and gitignore staging firebase

Author: solomonng2001

apps/question-service/.gitignore

@@ -1,5 +1,6 @@
 # Ignore private key json file
 cs3219-g24-firebase-adminsdk-9cm7h-b1675603ab.json
+cs3219-g24-staging-firebase-adminsdk-suafv-9c0d1b2299.json
 test_create_api_results.txt
 test_list_api_results.txt
 test_update_api_results.txt

apps/question-service/Dockerfile

@@ -0,0 +1,15 @@
+FROM golang:1.23
+
+WORKDIR /usr/src/app
+
+# pre-copy/cache go.mod for pre-downloading dependencies and only redownloading them in subsequent builds if they change
+COPY go.mod go.sum ./
+RUN go mod tidy && go mod download && go mod verify
+
+COPY . .
+
+RUN go build -v -o /usr/local/bin/app ./main.go
+
+EXPOSE 8080
+
+CMD ["app"]

apps/question-service/README.md

@@ -49,6 +49,20 @@ go run main.go
 
 The server will be available at http://localhost:8080.
 
+## Running the Application via Docker
+
+To run the application via Docker, run the following command:
+
+```bash
+docker build -t question-service .
+```
+
+```bash
+docker run -p 8080:8080 -d question-service
+```
+
+The server will be available at http://localhost:8080.
+
 ## API Endpoints
 
 - `POST /questions`