refactor: Fix node:lts image (#93)

Dockerfile

@@ -1,7 +1,8 @@
 # build stage (frontend)
-FROM node:lts-alpine as build-stage
+FROM node:16-buster as build-stage
+
 WORKDIR /app
-COPY package*.json ./
+COPY package.json yarn.lock ./
 
 RUN yarn -g install
 COPY . .
@@ -16,20 +17,20 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update && apt-get -y install wireshar
 
 RUN apt-get update && apt-get install -y --allow-change-held-packages --force-yes tshark
 
-
 # Install Python stuff
 RUN pip install cython
 ADD ./requirements.txt /tmp/requirements.txt
 
 RUN pip install --no-cache-dir -q -r /tmp/requirements.txt
 
-
-# Copy files
-ADD . /opt/packet_server/
+# Copy files (only ph/ module is required)
+ADD ph /opt/packet_server/ph 
 RUN mkdir -p /opt/packet_server/tmp
 RUN mkdir -p /opt/packet_server/static
 
 WORKDIR /opt/packet_server
+
+# Copy only built ui
 COPY --from=build-stage /app/dist/static static
 COPY --from=build-stage /app/dist/index.html static