Add some packages

alpine.dockerfile

@@ -1,7 +1,8 @@
 #This Dockerfile creates a build for all architectures
 
 #Image that copies in the files and passes them to the main image
-FROM ubuntu:focal AS copytask
+FROM alpine:3.16.2 AS copytask
+#FROM ubuntu:focal AS copytask
 
 ARG TARGETPLATFORM
 
@@ -13,7 +14,8 @@ COPY copy_runtime.sh /copy_runtime.sh
 RUN /copy_runtime.sh
 
 #Production image
-FROM ubuntu:focal
+FROM alpine:3.16.2 AS copytask
+#FROM ubuntu:focal
 
 COPY --from=copytask /Kavita /kavita
 COPY --from=copytask /files/wwwroot /kavita/wwwroot
@@ -23,6 +25,15 @@ RUN apt-get update \
   && apt-get install -y libicu-dev libssl1.1 libgdiplus curl \
   && rm -rf /var/lib/apt/lists/*
 
+# in /etc/apk/repositories
+# enable 3.16/community repo
+# enable edge/testing repo (with tag @testing)
+# https://wiki.alpinelinux.org/wiki/Package_management#Repository_pinning
+
+RUN apk add \
+    icu-dev libssl1.1 curl \
+    libgdiplus@testing
+
 COPY entrypoint.sh /entrypoint.sh
 
 EXPOSE 5000