add README.md

dnscrypt/README.md

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+dnscrypt + pdnsd
+================
+
+## About
+
+- dnscrypt: A protocol for securing communications between a client and a DNS resolver.
+- pdnsd: A DNS server designed for local caching of DNS information.
+
+## Fig
+
+    dnscrypt:
+      image: vimagick/dnscrypt
+      ports:
+        - "53:53/udp"
+        - "53:53/tcp"
+      restart: always
+
+## Run
+
+    fig up -d
+
+## Test
+
+    # UDP
+    dig @127.0.0.1 www.google.com
+
+    # TCP
+    dig @127.0.0.1 www.youtube.com +tcp
+