Install curl into the image as well

abra.sh

@@ -1,2 +1,2 @@
 export APP_INI_VERSION=v7
-export DOCKER_SETUP_SH_VERSION=v1
+export DOCKER_SETUP_SH_VERSION=v2

docker-setup.sh.tmpl

@@ -13,3 +13,5 @@ mkdir -p ${GITEA_CUSTOM} && chmod 0500 ${GITEA_CUSTOM}
 # Prepare temp folder
 mkdir -p ${GITEA_TEMP} && chmod 0700 ${GITEA_TEMP}
 if [ ! -w ${GITEA_TEMP} ]; then echo "${GITEA_TEMP} is not writable"; exit 1; fi
+
+apk add --no-cache curl