revert to use alpine 3.13 (#16451)

Co-authored-by: zeripath <art27@cantab.net>

Author: techknowlogick

Diff for: .drone.yml

@@ -404,7 +404,7 @@ steps:
 
   - name: update
     pull: default
-    image: alpine:3.14
+    image: alpine:3.13
     commands:
       - ./build/update-locales.sh
 

Diff for: Dockerfile

@@ -1,7 +1,7 @@
 
 ###################################
 #Build stage
-FROM golang:1.16-alpine3.14 AS build-env
+FROM golang:1.16-alpine3.13 AS build-env
 
 ARG GOPROXY
 ENV GOPROXY ${GOPROXY:-direct}
@@ -25,7 +25,7 @@ RUN if [ -n "${GITEA_VERSION}" ]; then git checkout "${GITEA_VERSION}"; fi \
 # Begin env-to-ini build
 RUN go build contrib/environment-to-ini/environment-to-ini.go
 
-FROM alpine:3.14
+FROM alpine:3.13
 LABEL maintainer="maintainers@gitea.io"
 
 EXPOSE 22 3000

Diff for: Dockerfile.rootless

@@ -1,7 +1,7 @@
 
 ###################################
 #Build stage
-FROM golang:1.16-alpine3.14 AS build-env
+FROM golang:1.16-alpine3.13 AS build-env
 
 ARG GOPROXY
 ENV GOPROXY ${GOPROXY:-direct}
@@ -25,7 +25,7 @@ RUN if [ -n "${GITEA_VERSION}" ]; then git checkout "${GITEA_VERSION}"; fi \
 # Begin env-to-ini build
 RUN go build contrib/environment-to-ini/environment-to-ini.go
 
-FROM alpine:3.14
+FROM alpine:3.13
 LABEL maintainer="maintainers@gitea.io"
 
 EXPOSE 2222 3000