Fix the Alpine build

docker/Dockerfile.j2

@@ -113,7 +113,7 @@ RUN apt-get update \
 ENV CARGO_HOME "/root/.cargo"
 ENV USER "root"
 {% endif %}
-{% if "amd64" in target_file %}
+{% if "amd64" in target_file and "alpine" not in target_file %}
 # Install DB packages
 RUN apt-get update && apt-get install -y \
     --no-install-recommends \

docker/amd64/Dockerfile.alpine

@@ -32,12 +32,6 @@ RUN rustup set profile minimal
 ENV USER "root"
 ENV RUSTFLAGS='-C link-arg=-s'
 
-# Install DB packages
-RUN apt-get update && apt-get install -y \
-    --no-install-recommends \
-    libmariadb-dev \
-    libpq-dev \
-    && rm -rf /var/lib/apt/lists/*
 
 # Creates a dummy project used to grab dependencies
 RUN USER=root cargo new --bin /app