[doc] fix broken links

README.md

@@ -102,7 +102,7 @@ APIcast uses:
 
 - [OpenResty](http://openresty.org/en/): a platform that includes NGINX, LuaJIT and Lua modules.
 - [busted](https://github.com/Olivine-Labs/busted): for the unit tests.
-- [Test::Nginx](http://search.cpan.org/~agent/Test-Nginx/lib/Test/Nginx/Socket.pm): for the integration tests.
+- [Test::Nginx](https://metacpan.org/pod/Test::Nginx): for the integration tests.
 
 More info can be found in the [development](/doc/development.md) specific doc.
 

dev-environments/camel-proxy/README.md

@@ -1,7 +1,7 @@
 # Camel PROXY
 
 Development environment to test integration between APIcast and proxies built
-on top of [Camel framework](https://camel.apache.org/components/4.0.x/netty-http-component.html)
+on top of [Camel framework](https://camel.apache.org/components/4.8.x/netty-http-component.html)
 
 This dev environment uses [Camel Netty Proxy example](https://github.com/zregvart/camel-netty-proxy).
 Any request that is received using the HTTP PROXY protocol,

doc/build.md

@@ -4,7 +4,7 @@ APIcast is an application based on [OpenResty](https://openresty.org/en/). APIca
 
 ## Release
 
-APIcast is released as [Docker image](https://docs.docker.com/engine/tutorials/dockerimages/). 
+APIcast is released as [Docker image](https://docs.docker.com).
 
 ## Dependencies
 

doc/why.md

@@ -16,7 +16,7 @@ All code is open-source on GitHub.
 
 Splitting code and configuration allows thorough testing of each component individually. We are trying hard to cover every feature and every fix by a regression test. 
 
-Using wonderful [Test::Nginx](http://search.cpan.org/~agent/Test-Nginx/lib/Test/Nginx/Socket.pm) framework for high level integration tests allows us to run every test several times in random order to ensure there are no random failures.
+Using wonderful [Test::Nginx](https://metacpan.org/pod/Test::Nginx) framework for high level integration tests allows us to run every test several times in random order to ensure there are no random failures.
 
 Low level unit testing is done in Lua testing framework [busted](https://github.com/Olivine-Labs/busted). That allows us to run low level tests for edge cases easily and run them in isolation.