Rebase to 3.15, clear cargo cache dirs

Author: thespad

Dockerfile

@@ -1,4 +1,4 @@
-FROM ghcr.io/linuxserver/baseimage-alpine:3.12
+FROM ghcr.io/linuxserver/baseimage-alpine:3.15
 
 # set version label
 ARG BUILD_DATE
@@ -53,7 +53,9 @@ RUN \
   apk del --purge \
     build-dependencies && \
   rm -rf \
-    /tmp/*
+    /tmp/* \
+    ${HOME}/.cargo \
+    ${HOME}/.cache
 
 # copy local files
 COPY root/ /

Dockerfile.aarch64

@@ -1,4 +1,4 @@
-FROM ghcr.io/linuxserver/baseimage-alpine:arm64v8-3.12
+FROM ghcr.io/linuxserver/baseimage-alpine:arm64v8-3.15
 
 # set version label
 ARG BUILD_DATE
@@ -53,7 +53,9 @@ RUN \
   apk del --purge \
     build-dependencies && \
   rm -rf \
-    /tmp/*
+    /tmp/* \
+    ${HOME}/.cargo \
+    ${HOME}/.cache
 
 # copy local files
 COPY root/ /

Dockerfile.armhf

@@ -1,4 +1,4 @@
-FROM ghcr.io/linuxserver/baseimage-alpine:arm32v7-3.12
+FROM ghcr.io/linuxserver/baseimage-alpine:arm32v7-3.15
 
 # set version label
 ARG BUILD_DATE
@@ -53,7 +53,9 @@ RUN \
   apk del --purge \
     build-dependencies && \
   rm -rf \
-    /tmp/*
+    /tmp/* \
+    ${HOME}/.cargo \
+    ${HOME}/.cache
 
 # copy local files
 COPY root/ /