remove jquery, cache files, add references, robots.txt, and sourcemaps

Makefile

@@ -69,7 +69,7 @@ build-next:
 
 .PHONY: build-base-php
 build-base-php:
-	docker build -t sillsdev/web-languageforge:base-php -f docker/base-php/Dockerfile .
+	docker build -t sillsdev/web-languageforge:base-php-7.4 -f docker/base-php/Dockerfile .
 
 .PHONY: composer-dev
 composer-dev:

docker/base-php/000-default.conf

@@ -8,6 +8,11 @@
 			Require all denied
 	</Directory>
 
+    #https://www.howtogeek.com/devops/how-to-configure-cache-control-headers-in-apache/
+    <FilesMatch ".(ico|pdf|flv|jpg|jpeg|png|gif|js|css|swf|woff|woff2|webm|svg|jsonp)$">
+        Header set Cache-Control "max-age=63072000, public"
+    </FilesMatch>
+
 	# https://httpd.apache.org/docs/2.4/mod/core.html#loglevel
 	#LogLevel info ssl:warn
 	ErrorLog ${APACHE_LOG_DIR}/error.log