Added support for launching psql tools from Docker

Author: mkopec3

Diff for: Dockerfile

@@ -0,0 +1,15 @@
+FROM ubuntu
+RUN apt-get update && \
+    apt-get upgrade -y && \
+    apt-get install git build-essential libreadline-dev zlib1g-dev bison flex -y && \
+    git clone https://github.com/mkopec3/postgres-pth.git /usr/local/src/postgres-pth && \
+    cd /usr/local/src/postgres-pth/ && \
+    ./configure --prefix=/ && \
+    make -j`nproc` -C src/interfaces/ install && \
+    make -j`nproc` -C src/bin/ install && \
+    cd && rm -rf /usr/local/src/postgres-pth/ && \
+    apt-get remove --purge git build-essential zlib1g-dev bison flex -y && \
+    apt-get autoremove -y && \
+    apt-get clean
+ENTRYPOINT [ "psql" ]
+CMD ["--version"]

Diff for: README.md

@@ -21,6 +21,8 @@ Pass-The-Hash enabled PostgreSQL client software on recent versions of Linux & W
 * Microsoft SDK 8.1
 * [PostgreSQL build dependencies](https://www.postgresql.org/docs/9.0/install-windows-full.html#AEN24042)
 
+**Docker**
+* Docker :)
 
 ### Installing
 
@@ -42,6 +44,9 @@ From VS2017 Developer Command Prompt:
 
 Copy \Release\libpq\libpq.dll, \Release\psqlpsql.exe, and vcruntime140.dll (you need to find it) files to the same selected directory
 
+**Docker**
+Refer to Usage section
+
 
 ### Usage
 
@@ -59,6 +64,13 @@ $ psql.exe -h 127.0.0.1 -p 5432 -U username dbname
 Hash for user username: md57bf07133****************1c058d18
 ```
 
+**Docker**
+
+```
+$ docker run -it mkopec3/postgres-pth -h X.X.X.X -p 5432 -U username dbname
+Hash for user username: md57bf07133****************1c058d18
+```
+
 
 ## Issues