env/matrix/nginx.conf

map $http_upgrade $connection_upgrade {
        default upgrade;
        ''      close;
}

server {
	server_name ${MATRIX_HOSTNAME} ${MATRIX_HOSTNAME}.${DOMAIN_NAME};
	client_max_body_size 128m;

	sendfile on;
	tcp_nopush on;
	tcp_nodelay on;
	keepalive_timeout 65;
	types_hash_max_size 2048;
	#include /etc/nginx/mime.types;
	#default_type application/octet-stream;

	gzip on;
	gzip_disable "msie6";

	proxy_read_timeout 1800s;

	# required to avoid HTTP 411: see Issue #1486 (https://github.com/dotcloud/docker/issues/1486)
	chunked_transfer_encoding on;

	location / {
		proxy_pass http://matrix-element:80;
		proxy_set_header Host $host;
		proxy_set_header X-Real-IP $remote_addr;
		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
		proxy_set_header X-Forwarded-Proto $scheme;
	}

	location ~ ^(/_matrix|/_synapse/client) {
		# note: do not add a path (even a single /) after the port in `proxy_pass`,
		# otherwise nginx will canonicalise the URI and cause signature verification
		# errors.
		proxy_pass http://matrix-synapse:8008;
		proxy_set_header X-Forwarded-For $remote_addr;
		proxy_set_header X-Forwarded-Proto $scheme;
		proxy_set_header Host $host;

		# Nginx by default only allows file uploads up to 1M in size
		# Increase client_max_body_size to match max_upload_size defined in homeserver.yaml
		client_max_body_size 50M;
	}

	# serve the static content for the well known files
	location /.well-known/matrix/server {
		default_type application/json;
		return 200 '{"m.server": "${MATRIX_HOSTNAME}.${DOMAIN_NAME}:443"}';
	}

	location /.well-known/matrix/client {
		default_type application/json;
		return 200 '{"m.homeserver":{"base_url": "https://${MATRIX_HOSTNAME}.${DOMAIN_NAME}"}}';  
	}

	# The federation port is also enabled, although it can also go through 443
	listen 8448 ssl http2 default_server;
	#listen [::]:8448 ssl http2 default_server;

	include /etc/nginx/includes/ssl.conf;
}