Dockerfile improvements and automatic Github Actions builds (#14)

* Initial GA push

* Fix Actions

* Remove test runs

* Update Trivy scanner to latest syntax

* Remove unnecessary build stage

* Switch to slim base images

* Minor Dockerfile improvements

* Fix slim builds

* Fix slim builds round 2

Dockerfile

@@ -2,27 +2,35 @@
 # Docker build environment #
 ############################
 
-FROM node:18.16.1-bookworm AS build
+FROM node:18.16.1-bookworm-slim AS build
+
+# Upgrade all packages and install dependencies
+RUN apt-get update \
+    && apt-get upgrade -y
+RUN DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+        python3 \
+        build-essential \
+    && apt clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 WORKDIR /build
 
 COPY . .
 
-RUN npm i
-RUN npm run build
+# Build Public Pool using NPM
+RUN npm i && npm run build
 
 ############################
 # Docker final environment #
 ############################
 
-FROM node:18.16.1-bookworm
+FROM node:18.16.1-bookworm-slim
 
-EXPOSE 3333
-EXPOSE 3334
-EXPOSE 8332
+# Expose ports for Stratum and Bitcoin RPC
+EXPOSE 3333 3334 8332
 
 WORKDIR /public-pool
 
+# Copy built binaries into the final image
 COPY --from=build /build .
 #COPY .env.example .env