Optimized Dockerfile to reduce uncompressed image size

Combining apk del commands in the same layer as their add commands shaves off ~270MB when uncompressed.

Dockerfile

@@ -7,37 +7,35 @@ WORKDIR /usr/src/shynet
 ARG GF_UID="500"
 ARG GF_GID="500"
 RUN apk update && \
-	apk add gettext curl bash npm libffi-dev rust cargo
+	apk add --no-cache gettext bash npm libffi-dev rust cargo postgresql-libs
 	# libffi-dev and rust are used for the cryptography package,
 	# which we indirectly rely on. Necessary for aarch64 support.
 
 # Collect GeoIP Database
-RUN curl -m 180 "https://download.maxmind.com/app/geoip_download?edition_id=GeoLite2-ASN&license_key=kKG1ebhL3iWVd0iv&suffix=tar.gz" | tar -xvz -C /tmp && \
+RUN apk add --no-cache curl && \
+    curl -m 180 "https://download.maxmind.com/app/geoip_download?edition_id=GeoLite2-ASN&license_key=kKG1ebhL3iWVd0iv&suffix=tar.gz" | tar -xvz -C /tmp && \
 	curl -m 180 "https://download.maxmind.com/app/geoip_download?edition_id=GeoLite2-City&license_key=kKG1ebhL3iWVd0iv&suffix=tar.gz" | tar -xvz -C /tmp && \
 	mv /tmp/GeoLite2*/*.mmdb /etc && \
-	apk del curl
+	apk --purge del curl
 
 # Move dependency files
 COPY poetry.lock pyproject.toml ./
 COPY package.json package-lock.json ../
 # Django expects node_modules to be in its parent directory.
 
-# Install more dependencies
-RUN apk add --no-cache postgresql-libs && \
-	apk add --no-cache --virtual .build-deps gcc musl-dev postgresql-dev libressl-dev libffi-dev && \
+# Install more dependencies and cleanup build dependencies afterwards
+RUN apk add --no-cache --virtual .build-deps gcc musl-dev postgresql-dev libressl-dev libffi-dev && \
 	npm i -P --prefix .. && \
-	pip install poetry==1.2.2
-
-# Install Python dependencies
-RUN poetry config virtualenvs.create false && \
+	pip install poetry==1.2.2 && \
+    poetry config virtualenvs.create false && \
     poetry run pip install "Cython<3.0" "pyyaml==5.4.1" --no-build-isolation && \
-    poetry install --no-dev --no-interaction --no-ansi
+    poetry install --no-dev --no-interaction --no-ansi && \
+    apk --purge del .build-deps && \
+    rm -rf /var/lib/apt/lists/* && \
+    rm /var/cache/apk/*
 
-# Cleanup dependencies & setup user group
-RUN apk --purge del .build-deps && \
-	rm -rf /var/lib/apt/lists/* && \
-	rm /var/cache/apk/* && \
-	addgroup --system -g $GF_GID appgroup && \
+# Setup user group
+RUN addgroup --system -g $GF_GID appgroup && \
 	adduser appuser --system --uid $GF_UID -G appgroup && \
 	mkdir -p /var/local/shynet/db/ && \
 	chown -R appuser:appgroup /var/local/shynet