feat(docker): added docker multi stage build

Dockerfile

@@ -1,13 +1,29 @@
-FROM node:18-alpine
+# build stage for building .ts files
+FROM node:18-alpine as build
+
+RUN mkdir /home/app
+
+WORKDIR /home/app
+
+COPY package.json .
+
+RUN npm install --ignore-scripts
+
+COPY . .
+
+RUN npm run build
+
+# prod stage for including only necessary files
+FROM node:18-alpine as prod
 
-LABEL description="Aniwatch API docker image"
 LABEL org.opencontainers.image.source https://github.com/ghoshRitesh12/aniwatch-api
+LABEL org.opencontainers.image.description "Aniwatch API docker image"
 
 # create a non-privileged user
 RUN addgroup -S aniwatch && adduser -S zoro -G aniwatch
 
 # set secure folder permissions
-RUN mkdir /app && chown -R zoro:aniwatch /app
+RUN mkdir -p /app/public /app/dist && chown -R zoro:aniwatch /app
 
 # set non-privileged user
 USER zoro
@@ -21,8 +37,11 @@ COPY --chown=zoro:aniwatch package.json .
 # install dependencies
 RUN npm install --omit=dev --ignore-scripts
 
-# copy all necessary files in the container (except ones in .dockerignore)
-COPY --chown=zoro:aniwatch . .
+# copy public folder from build stage to prod
+COPY --from=build --chown=zoro:aniwatch /home/app/public /app/public
+
+# copy dist folder from build stage to prod
+COPY --from=build --chown=zoro:aniwatch /home/app/dist /app/dist
 
 HEALTHCHECK --interval=30s --timeout=3s --start-period=5s CMD [ "npm", "run", "healthcheck" ]
 
@@ -33,3 +52,5 @@ ENV PORT=4000
 EXPOSE 4000
 
 CMD [ "node", "dist/server.js" ]
+
+# exit