refactor: use env variables and update project structure

Dockerfile

@@ -0,0 +1,16 @@
+FROM node:20-alpine
+
+# Install docker cli to be able to run 'docker logs' from within the container
+# Note: You must mount /var/run/docker.sock when running this container
+RUN apk add --no-cache docker-cli
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm install
+
+COPY . .
+
+RUN npm run build
+
+CMD ["npm", "start"]