add standalone and webroot methods

Dockerfile

@@ -11,17 +11,30 @@ FROM base-${TARGETARCH}${TARGETVARIANT}
 
 ARG S6_OVERLAY_VERSION=3.1.5.0
 
-ENV DOMAINS=
-ENV EMAIL=
-ENV INTERVAL="0 */6 * * *"
-ENV STAGING=false
-ENV PROPOGATION_TIME=10
-ENV GENERATE_DHPARAM=true
-ENV TZ=UTC
+# Core variables
 ENV PUID=1000
 ENV PGID=1000
+ENV TZ=UTC
+ENV GENERATE_DHPARAM=true
+ENV INTERVAL="0 */6 * * *"
+
+# Single domain
+ENV DOMAINS=
+ENV EMAIL=
+ENV STAGING=false
+
+# Custom CA support
+ENV CUSTOM_CA=
+ENV CUSTOM_CA_SERVER=
+
+# Different plugin support (to support Cloudflare but also normal mode)
+ENV PLUGIN=standalone
+ENV PROPOGATION_TIME=10
 ENV CLOUDFLARE_TOKEN=
 
+## Multi-cert support
+ENV CERT_COUNT=1
+
 #Get required packages
 RUN apk update && apk add curl bash python3 py3-virtualenv procps tzdata nano shadow xz busybox-suid openssl