Update pinned versions (#4)

Dockerfile

@@ -1,20 +1,20 @@
-FROM alpine:3.19.1
+FROM alpine:3.20.2
 
 RUN \
     # Update and install system applications
     apk add --update --no-cache \
-        bind-tools=9.18.24-r1 \
-        certbot=2.7.4-r0 \
-        curl=8.5.0-r0 \
-        libcap=2.69-r1 \
-        lua-resty-core=0.1.27-r0 \
-        nginx=1.24.0-r16 \
-        nginx-mod-http-fancyindex=1.24.0-r16 \
-        nginx-mod-http-headers-more=1.24.0-r16 \
-        nginx-mod-http-lua=1.24.0-r16 \
-        openssl=3.1.4-r6 \
-        shadow=4.14.2-r0 \
-        tini=0.19.0-r2 && \
+        bind-tools=9.18.27-r0 \
+        certbot=2.10.0-r1 \
+        curl=8.9.1-r1 \
+        libcap=2.70-r0 \
+        lua-resty-core=0.1.28-r0 \
+        nginx=1.26.2-r0 \
+        nginx-mod-http-fancyindex=1.26.2-r0 \
+        nginx-mod-http-headers-more=1.26.2-r0 \
+        nginx-mod-http-lua=1.26.2-r0 \
+        openssl=3.3.1-r3 \
+        shadow=4.15.1-r0 \
+        tini=0.19.0-r3 && \
     # Remove default NGINX vHosts and websites
     rm -f /etc/nginx/sites-enabled/default && \
     rm -f /etc/nginx/sites-available/default && \