fix: use BUILD for make, related to #1194

Author: ken-matsui

.github/workflows/demo.yml

@@ -23,7 +23,7 @@ jobs:
         run: make versions
 
       - name: Build Cabin
-        run: make RELEASE=1 -j4
+        run: make BUILD=release -j4
 
       - name: Install Cabin
         run: |

Dockerfile

@@ -18,7 +18,7 @@ COPY .git .
 COPY Makefile .
 COPY src ./src/
 
-RUN make RELEASE=1 install
+RUN make BUILD=release install
 
 
 FROM $base

INSTALL.md

@@ -81,5 +81,5 @@ Once you have all the necessary requirements in place, you can build Cabin by th
 ```bash
 git clone https://github.com/cabinpkg/cabin.git
 cd cabin
-make RELEASE=1 -j$(nproc) install
+make BUILD=release -j$(nproc) install
 ```