Dockerfiles: fix warning DL3059, consolidate RUN statements

Author: dannywillems

docker/producer-dashboard/Dockerfile

@@ -59,11 +59,11 @@ RUN curl -s -L https://github.com/ocaml/opam/releases/download/2.1.2/opam-2.1.2-
 
 RUN apt-get -y --no-install-recommends install m4 pkg-config
 
-RUN opam init --disable-sandboxing
-RUN opam switch create .
-RUN eval "$(opam config env)"
-RUN opam switch import -y opam.export
-RUN ./scripts/pin-external-packages.sh
+RUN opam init --disable-sandboxing && \
+    opam switch create . && \
+    eval "$(opam config env)" && \
+    opam switch import -y opam.export && \
+    ./scripts/pin-external-packages.sh
 
 RUN curl -L https://go.dev/dl/go1.19.linux-amd64.tar.gz -o go1.19.tar.gz \
     && tar -C /usr/local -xzf go1.19.tar.gz \

frontend/Dockerfile

@@ -3,11 +3,10 @@ FROM node:18 AS BUILD_IMAGE
 ARG BUILD_CONFIGURATION=production
 WORKDIR /app
 COPY . .
-RUN npm install
-RUN node_modules/.bin/ng build --configuration ${BUILD_CONFIGURATION}
-RUN npm prune --production
-
-RUN echo "---------- USING APACHE ----------"
+RUN npm install && \
+    node_modules/.bin/ng build --configuration ${BUILD_CONFIGURATION} && \
+    npm prune --production && \
+    echo "---------- USING APACHE ----------"
 
 
 FROM httpd:2.4

tools/heartbeats-processor/Dockerfile

@@ -5,8 +5,8 @@ WORKDIR /usr/src/app
 RUN apt-get update && apt-get install -y --no-install-recommends pkg-config libssl-dev && rm -rf /var/lib/apt/lists/*
 
 COPY . .
-RUN ls -la tools/heartbeats-processor
-RUN cargo build --release -p heartbeats-processor
+RUN ls -la tools/heartbeats-processor && \
+    cargo build --release -p heartbeats-processor
 
 # Runtime stage
 FROM debian:bookworm-slim