BULL-1622: Increase Lighthouse Score

Increase Lighthouse score using more efficient image format and text compression.

custom-csp.conf/custom-csp.conf

-add_header Content-Security-Policy "
-        default-src 'self';
-        script-src 'self' *.dso.mil 'nonce-$cspNonce' www.google-analytics.com;
-        script-src-elem 'self' *.dso.mil 'nonce-$cspNonce' www.google-analytics.com;
-        style-src 'self' *.dso.mil 'nonce-$cspNonce' fonts.googleapis.com;
-        style-src-elem 'self' *.dso.mil 'nonce-$cspNonce' fonts.googleapis.com;
-        img-src 'self' data: mediastream: blob: *.dso.mil 'nonce-$cspNonce' www.google-analytics.com;
-        connect-src 'self' *.dso.mil 'nonce-$cspNonce' www.google-analytics.com spreadsheets.google.com docs.google.com;
-        font-src 'self' *.dso.mil  'nonce-$cspNonce' fonts.gstatic.com;
-        object-src 'self' *.dso.mil 'nonce-$cspNonce';
-        media-src 'self' *.dso.mil 'nonce-$cspNonce' ib-prod-gitlab-lfs.s3.us-gov-west-1.amazonaws.com;
-        form-action 'self' *.dso.mil;
-        frame-src 'none';
-        frame-ancestors 'none';" always;
+location ^~ / {
+	add_header Content-Security-Policy "
+		default-src 'self';
+		script-src 'self' *.dso.mil 'nonce-$cspNonce' www.google-analytics.com;
+		script-src-elem 'self' *.dso.mil 'nonce-$cspNonce' www.google-analytics.com;
+		style-src 'self' *.dso.mil 'nonce-$cspNonce' fonts.googleapis.com;
+		style-src-elem 'self' *.dso.mil 'nonce-$cspNonce' fonts.googleapis.com;
+		img-src 'self' data: mediastream: blob: *.dso.mil 'nonce-$cspNonce' www.google-analytics.com;
+		connect-src 'self' *.dso.mil 'nonce-$cspNonce' www.google-analytics.com spreadsheets.google.com docs.google.com;
+		font-src 'self' *.dso.mil  'nonce-$cspNonce' fonts.gstatic.com;
+		object-src 'self' *.dso.mil 'nonce-$cspNonce';
+		media-src 'self' *.dso.mil 'nonce-$cspNonce' ib-prod-gitlab-lfs.s3.us-gov-west-1.amazonaws.com;
+		form-action 'self' *.dso.mil;
+		frame-src 'none';
+		frame-ancestors 'none';" always;
+
+	gzip on;
+	gzip_disable "msie6";
+
+	gzip_comp_level 6;
+	gzip_min_length 1100;
+	gzip_buffers 16 8k;
+	gzip_proxied any;
+	gzip_types
+		text/plain
+		text/css
+		text/js
+		text/xml
+		text/javascript
+		application/javascript
+		application/json
+		application/xml
+		application/rss+xml
+		image/svg+xml;
+}