Use Poetry, not Pipenv

Dockerfile

@@ -1,26 +1,39 @@
-FROM python:alpine3.12
+FROM python:alpine3.14
 
 # Getting things ready
 WORKDIR /usr/src/shynet
-COPY Pipfile.lock Pipfile ./
-COPY package.json package-lock.json ../
-# Django expects node_modules to be in its parent directory.
 
 # Install dependencies & configure machine
 ARG GF_UID="500"
 ARG GF_GID="500"
 RUN apk update && \
-	apk add gettext curl bash npm && \
-	curl -m 180 "https://download.maxmind.com/app/geoip_download?edition_id=GeoLite2-ASN&license_key=kKG1ebhL3iWVd0iv&suffix=tar.gz" | tar -xvz -C /tmp && \
+	apk add gettext curl bash npm libffi-dev rust cargo
+	# 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 && \
 	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 add --no-cache postgresql-libs && \
+	apk 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 && \
 	npm i -P --prefix .. && \
-	pip install pipenv~=2020.6.2 && \
-	pipenv install --system --deploy && \
-	apk --purge del .build-deps && \
+	pip install poetry==1.1.7
+
+# Install Python dependencies
+RUN poetry config virtualenvs.create false && \
+    poetry install --no-dev --no-interaction --no-ansi
+
+# 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 && \