Use build image and copy for loki

loki/Dockerfile

@@ -1,29 +1,32 @@
 # https://github.com/hassio-addons/addon-base/releases
 ARG BUILD_FROM=ghcr.io/hassio-addons/base/amd64:9.1.5
 
-# hadolint ignore=DL3006
-FROM $BUILD_FROM
-
 # https://github.com/grafana/loki/releases
+FROM alpine:3.13.4 as build
 ENV LOKI_VERSION 2.2.0
 
-# Add Loki
 RUN set -eux; \
+    apk update; \
+    apk add --no-cache --virtual .build-deps \
+        unzip=6.0-r8 \
+        curl=7.74.0-r1 \
+        ; \
     APKARCH="$(apk --print-arch)"; \
     case "$APKARCH" in \
-    x86_64)  BINARCH='amd64' ;; \
-    armhf)   BINARCH='arm' ;; \
-    armv7)   BINARCH='arm' ;; \
-    aarch64) BINARCH='arm64' ;; \
-    *) echo >&2 "error: unsupported architecture ($APKARCH)"; exit 1 ;; \
+        x86_64)  BINARCH='amd64' ;; \
+        armhf)   BINARCH='arm' ;; \
+        armv7)   BINARCH='arm' ;; \
+        aarch64) BINARCH='arm64' ;; \
+        *) echo >&2 "error: unsupported architecture ($APKARCH)"; exit 1 ;; \
     esac; \
-    \
     curl -J -L -o /tmp/loki.zip "https://github.com/grafana/loki/releases/download/v${LOKI_VERSION}/loki-linux-${BINARCH}.zip"; \
     unzip /tmp/loki.zip -d /usr/bin; \
     mv /usr/bin/loki-linux-${BINARCH} /usr/bin/loki; \
-    chmod a+x /usr/bin/loki; \
-    loki -version; \
-    rm -f /tmp/loki.zip;
+    chmod a+x /usr/bin/loki;
+
+
+# hadolint ignore=DL3006
+FROM $BUILD_FROM
 
 # add Nginx
 # hadolint ignore=DL3009
@@ -46,12 +49,16 @@ RUN set -eux; \
 # See https://github.com/grafana/loki/issues/1928
 RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
 
-COPY rootfs /
+# Add Loki
+COPY --from=build /usr/bin/loki /usr/bin/loki
+
+WORKDIR /data/loki
 RUN set -eux; \
-    mkdir -p /data/loki; \
+    loki --version; \
     addgroup -S abc; \
     adduser -u 12345 -h /data/loki -D -S abc -G abc;
-WORKDIR /data/loki
+
+COPY rootfs /
 
 # Build arguments
 ARG BUILD_ARCH