Merge pull request #747 from knorrium/be_dockerfile_fixes

Fix non-deterministic TypeScript version on Dockerfile

docker/backend/Dockerfile

@@ -5,8 +5,7 @@ COPY . .
 
 RUN apt-get update
 RUN apt-get install -y build-essential python3 pkg-config
-RUN npm ci --production
-RUN npm i typescript
+RUN npm install
 RUN npm run build
 
 FROM node:12-buster-slim