Import GPG keys from keyserver

Import Nginx public keys directly from the new sks-keyservers.net.

Author: rtucek

Dockerfile

@@ -60,18 +60,13 @@ RUN \
 
     # GPG keys from the main maintainers of Nginx
     # Source https://nginx.org/en/pgp_keys.html
-    curl -SLO https://nginx.org/keys/nginx_signing.key && \
-    gpg --import nginx_signing.key && \
-    curl -SLO https://nginx.org/keys/aalexeev.key && \
-    gpg --import aalexeev.key && \
-    curl -SLO https://nginx.org/keys/is.key && \
-    gpg --import is.key && \
-    curl -SLO https://nginx.org/keys/mdounin.key && \
-    gpg --import mdounin.key && \
-    curl -SLO https://nginx.org/keys/maxim.key && \
-    gpg --import maxim.key && \
-    curl -SLO https://nginx.org/keys/sb.key && \
-    gpg --import sb.key && \
+    gpg --keyserver sks-keyservers.net --recv-keys \
+        "6550 6C02 EFC2 50F1 B7A3  D694 ECF0 E90B 2C17 2083" \
+        "4C2C 85E7 05DC 7308 3399  0C38 A937 6139 A524 C53E" \
+        "B0F4 2533 73F8 F6F5 10D4  2178 520A 9993 A1C0 52F8" \
+        "7338 9730 69ED 3F44 3F4D  37DF A64F D5B1 7ADB 39A8" \
+        "A09C D539 B8BB 8CBE 96E8  2BDF ABD4 D3B3 F580 6B4D" \
+        "573B FD6B 3D8F BC64 1079  A6AB ABF5 BD82 7BD9 BF62" && \
 
     # Verify signature
     curl -SLO https://nginx.org/download/nginx-${NGINX_VERSION}.tar.gz.asc && \