Add Amplitude analytics integration and update environment variables

Author: ed-asriyan

.env

@@ -21,6 +21,7 @@ VITE_USERNAMES=🐵,🐒,🦍,🦧,🐶,🐕,🦮,🐕‍🦺,🐩,🐺,🦊,
 #
 VITE_SENTRY_DSN=
 VITE_ANALYTICS_MEASHUREMENT_ID=
+VITE_AMPLITUDE_API_KEY=
 
 # URL of running HLS-proxy (https://github.com/warren-bank/HLS-Proxy). better to have on dedicated server
 VITE_API_HLS_PROXY_URL=

Dockerfile

@@ -40,6 +40,7 @@ ARG VITE_API_HTTP_PROXY_URL
 ARG VITE_API_VIDEO_EXTRACTOR_URL
 ARG VITE_SENTRY_DSN
 ARG VITE_ANALYTICS_MEASHUREMENT_ID
+ARG VITE_AMPLITUDE_API_KEY
 ARG VITE_VERSION
 ARG NODE_ENV