4 spaces.

Dockerfile

@@ -1,34 +1,34 @@
 FROM alpine:3.12
 
 LABEL description="PostfixAdmin is a web based interface used to manage mailboxes" \
-   maintainer="Hardware <[email protected]>"
+    maintainer="Hardware <[email protected]>"
 
 ARG VERSION=3.2.4
 ARG SHA256_HASH="f61a64b32052c46f40cba466e5e384de0efab8c343c91569bcc5ebfd3694811e"
 
 RUN set -eux; \
-   apk add --no-cache \
-      su-exec \
-      dovecot \
-      tini \
-      \
-      php7 \
-      php7-fpm \
-      php7-imap \
-      php7-mbstring \
-      php7-mysqli \
-      php7-pgsql \
-      php7-phar \
-      php7-session \
-   ; \
-   \
-   PFA_TARBALL="postfixadmin-${VERSION}.tar.gz"; \
-   wget -q https://github.com/postfixadmin/postfixadmin/archive/${PFA_TARBALL}; \
-   echo "${SHA256_HASH} *${PFA_TARBALL}" | sha256sum -c; \
-   \
-   mkdir /postfixadmin; \
-   tar -xzf ${PFA_TARBALL} --strip-components=1 -C /postfixadmin; \
-   rm -f ${PFA_TARBALL}
+    apk add --no-cache \
+        su-exec \
+        dovecot \
+        tini \
+        \
+        php7 \
+        php7-fpm \
+        php7-imap \
+        php7-mbstring \
+        php7-mysqli \
+        php7-pgsql \
+        php7-phar \
+        php7-session \
+    ; \
+    \
+    PFA_TARBALL="postfixadmin-${VERSION}.tar.gz"; \
+    wget -q https://github.com/postfixadmin/postfixadmin/archive/${PFA_TARBALL}; \
+    echo "${SHA256_HASH} *${PFA_TARBALL}" | sha256sum -c; \
+    \
+    mkdir /postfixadmin; \
+    tar -xzf ${PFA_TARBALL} --strip-components=1 -C /postfixadmin; \
+    rm -f ${PFA_TARBALL}
 
 COPY bin /usr/local/bin
 RUN chmod +x /usr/local/bin/*