Make a Dockerfile and update Readme

Dockerfile

@@ -0,0 +1,49 @@
+# ---- Build stage ---- 
+FROM alpine:latest AS builder 
+
+# Install build tools and dependencies 
+RUN apk add --no-cache \
+    build-base \ 
+    git \ 
+    json-c-dev \
+    libmnl-dev 
+
+# --------------------------------- 
+# Build libsavl as a static library 
+# --------------------------------- 
+WORKDIR /deps 
+RUN git clone https://github.com/ipilcher/libsavl.git 
+WORKDIR /deps/libsavl 
+RUN mkdir -p /usr/local/include \
+    && gcc -std=gnu99 -O3 -Wall -Wextra -c savl.c -o savl.o \
+    && ar rcs libsavl.a savl.o \
+    && cp libsavl.a /usr/local/lib/ \
+    && cp savl.h /usr/local/include/ 
+
+# --------------------------------- 
+# Build fdf 
+# --------------------------------- 
+WORKDIR /app 
+RUN git clone https://github.com/ipilcher/fdf.git . 
+WORKDIR /app 
+
+# Link against static libsavl 
+RUN gcc -std=gnu99 -O3 -Wall -Wextra \
+    -I/usr/local/include -I/usr/include/json-c \
+    src/*.c \
+    -L/usr/local/lib -lsavl -ljson-c -lmnl \
+    -o fdfd
+
+
+# ---- Runtime stage ---- 
+FROM alpine:latest 
+
+# Runtime dependencies 
+RUN apk add --no-cache \
+    json-c \
+    libmnl \
+    libstdc++ 
+
+COPY --from=builder /app/fdfd /usr/local/bin/fdfd
+ENTRYPOINT ["fdfd"] 
+CMD ["--help"]

README.md

@@ -570,3 +570,22 @@ Feb 26 17:33:49 asterisk.penurio.us fdfd[18317]: INFO: filter.c:214: Loaded filt
 Feb 26 17:33:49 asterisk.penurio.us fdfd[18317]: INFO: filter.c:214: Loaded filter (mdns_answe..." ]
 Hint: Some lines were ellipsized, use -l to show in full.
 ```
+
+## Docker
+
+If you would like to run this as a container
+
+1. ```docker build -t fdf .```
+2. ```docker run --name fdf fdf```
+
+```fdfd options:
+    -l | --syslog:  log messages to syslog
+    -e | --stderr:  log messages to stderr
+    -d | --debug: log debug level messages
+    -p | --pktlog: enable verbose packet logging
+    -c | --config: specify configuration file
+    -h | --help: show this message and exit
+```
+
+From there you may wish to pass arguments to the run command, run it through compose as a daemon, etc.
+