Expose max_upload_size as a configurable option

.env.sample

@@ -86,6 +86,8 @@ RETENTION_MAX_LIFETIME=4w
 #MEDIA_RETENTION_LOCAL_LIFETIME=30d
 #MEDIA_RETENTION_REMOTE_LIFETIME=14d
 
+MAX_UPLOAD_SIZE=50M
+
 ## Old Signing Key
 #OLD_SIGNING_KEY_ID=a_OLDKEYID
 #OLD_SIGNING_KEY=base64string

compose.yml

@@ -12,6 +12,7 @@ services:
       - STACK_NAME
       - NGINX_ACCESS_LOG_LOCATION
       - NGINX_ERROR_LOG_LOCATION
+      - MAX_UPLOAD_SIZE
     configs:
       - source: nginx_config
         target: /etc/nginx/nginx.conf
@@ -89,6 +90,7 @@ services:
       - LOGIN_LIMIT_ACCOUNT_PER_SECOND=${LOGIN_LIMIT_ACCOUNT_PER_SECOND:-0.003}
       - LOGIN_LIMIT_ACCOUNT_BURST=${LOGIN_LIMIT_ACCOUNT_BURST:-5}
       - WEB_CLIENT_LOCATION
+      - MAX_UPLOAD_SIZE
     networks:
       - internal
     entrypoint: /docker-entrypoint.sh

homeserver.yaml.tmpl

@@ -130,7 +130,7 @@ log_config: "/data/log.config"
 media_store_path: "/data/media_store"
 
 # https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#max_upload_size 
-max_upload_size: 50M
+max_upload_size: {{ or (env "MAX_UPLOAD_SIZE") 50M }}
 
 # https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#turn
 {{ if eq (env "TURN_ENABLED") "1" }}

nginx.conf.tmpl

@@ -28,7 +28,7 @@ http {
       proxy_set_header X-Forwarded-For $remote_addr;
       proxy_set_header X-Forwarded-Proto https;
       proxy_set_header Host $host;
-      client_max_body_size 50M;
+      client_max_body_size {{ or (env "MAX_UPLOAD_SIZE") "50M" }}
       proxy_http_version 1.1;
     }
     
@@ -37,7 +37,7 @@ http {
       proxy_set_header X-Forwarded-For $remote_addr;
       proxy_set_header X-Forwarded-Proto https;
       proxy_set_header Host $host;
-      client_max_body_size 50M;
+      client_max_body_size {{ or (env "MAX_UPLOAD_SIZE") "50M" }};
       proxy_http_version 1.1;
     }
 
@@ -56,7 +56,7 @@ http {
       proxy_set_header X-Forwarded-For $remote_addr;
       proxy_set_header X-Forwarded-Proto https;
       proxy_set_header Host $host;
-      client_max_body_size 50M;
+      client_max_body_size {{ or (env "MAX_UPLOAD_SIZE") "50M" }};
       proxy_http_version 1.1;
     }
 {{ end }}