Refactor docker image

docker/rootfs/etc/services.d/go2rtc/finish

@@ -0,0 +1,12 @@
+#!/command/with-contenv bashio
+# ==============================================================================
+# Take down the S6 supervision tree when go2rtc fails
+# ==============================================================================
+# shellcheck shell=bash
+
+if [[ "${1}" -ne 0 ]] && [[ "${1}" -ne 256 ]]; then
+    bashio::log.warning "go2rtc crashed, halting add-on"
+    /run/s6/basedir/bin/halt
+fi
+
+bashio::log.info "go2rtc stopped, restarting..."

docker/rootfs/etc/services.d/go2rtc/run

@@ -0,0 +1,23 @@
+#!/command/with-contenv bashio
+# ==============================================================================
+# Runs go2rtc
+# ==============================================================================
+# shellcheck shell=bash
+
+bashio::log.info 'Starting go2rtc...'
+
+declare config_path
+declare binary_path
+
+config_path="/config"
+
+binary_path="/usr/local/bin/go2rtc"
+if [[ -x "${config_path}/go2rtc" ]]; then
+  binary_path="${config_path}/go2rtc"
+  bashio::log.warning "Using go2rtc binary from '${binary_path}'"
+fi
+
+# set cwd for go2rtc (for config file, Hass integration, etc)
+cd "${config_path}" || bashio::exit.nok "Could not change working directory"
+
+exec "${binary_path}"