Switch to alpine base image (#2872)

# What this PR does

## Which issue(s) this PR fixes

## Checklist

- [ ] Unit, integration, and e2e (if applicable) tests updated
- [ ] Documentation added (or `pr:no public docs` PR label added if not
required)
- [ ] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Changed
+
+- Switch engine to alpine base image ([2872](https://github.com/grafana/oncall/pull/2872))
+
 ### Fixed
 
 - Address bug when a Shift Swap Request is accepted either via the web or mobile UI, and the Slack message is not

engine/Dockerfile

@@ -1,25 +1,24 @@
-FROM python:3.11.4-slim-bookworm AS base
+FROM python:3.11.4-alpine3.18 AS base
 
 # Create a group and user to run an app
 ENV APP_USER=appuser
-RUN groupadd --system --gid 2000 ${APP_USER} && \
-    useradd --no-log-init --system --uid 1000 --gid ${APP_USER} ${APP_USER}
+RUN addgroup --system --gid 2000 ${APP_USER} && \
+    adduser --system --uid 1000 --ingroup ${APP_USER} ${APP_USER}
 
-RUN apt-get update && apt-get install -y \
-    python3-dev \
-    gcc \
-    libmariadb-dev \
-    libpq-dev \
-    netcat-traditional \
-    curl \
-    bash \
-    git \
-    libpcre3 \
-    libpcre3-dev
+RUN apk add bash \
+            python3-dev \
+            build-base \
+            linux-headers \
+            pcre-dev \
+            mariadb-connector-c-dev \
+            libffi-dev \
+            git \
+            postgresql-dev 
 
 WORKDIR /etc/app
 COPY ./requirements.txt ./
 RUN pip install --upgrade pip
+RUN pip install --upgrade setuptools wheel
 RUN pip install -r requirements.txt
 
 # we intentionally have two COPY commands, this is to have the requirements.txt in a separate build step
@@ -48,7 +47,7 @@ RUN chown -R ${APP_USER}:${APP_USER} /tmp/prometheus_django_metrics
 ENV prometheus_multiproc_dir "/tmp/prometheus_django_metrics"
 
 FROM base AS dev
-RUN apt-get install -y sqlite3 default-mysql-client postgresql-client
+RUN apk add sqlite mysql-client postgresql-client
 RUN pip install -r requirements-dev.txt
 
 FROM dev AS dev-enterprise

engine/requirements.txt

@@ -46,7 +46,7 @@ opentelemetry-instrumentation-celery==0.36b0
 opentelemetry-instrumentation-pymysql==0.36b0
 opentelemetry-instrumentation-wsgi==0.36b0
 opentelemetry-exporter-otlp-proto-grpc==1.15.0
-pyroscope-io==0.8.1
+# pyroscope-io==0.8.1
 django-dbconn-retry==0.1.7
 django-ipware==4.0.2
 django-anymail==8.6